Type 517 radar is believed to be an A-band/VHF air search radar widely deployed on PLAN surface vessels with 4 antennas in two crossed-brace supported pairs, one above the other, mounted in pairs on each side of a single tubular support carried on the turning gear. Similar to the Russian P-8 'Dolphin'/KNIFE REST radar which China manufactures and deploys for the HQ-2 surface to air system complex, it is believed that Type 517 has similar capabilities and specifications. The system is manufactured by the Beijing Leiyin Electronic Technology Development Company (北京雷音电子技术开发有限公司). Specifications Technical Specification System Band: meter-band Beam width: 5° (H), 30° (V) Scan coverage: 360°×30° Range: 350 km against 4 m2 RCS target; 100 km against 0.1 m2 RCS Stealth aircraft Accuracy: range error ≤200m, angle error ≤1° Processing capacity Multiple tracking: ≥ 20 pcs Antenna Antenna : Yagi-Uda array Rotation speed: 6 RPM Transmitter / Receiver Frequency: 180–210 MHz (meter-band) NF: <6 dB Power Supply AC: 220VAC (150~250 VAC) Power consumption: 25 kW Features Non-coherent pulse compression (NCPC) system Moving target automatically detection Long range air surveillance Other reported names: Spider (export) SUR17B External links High Accuracy Air / Land Surveillance Radar System Of Long Range Detection Beijing Leiyin Electronic Technology Development Co. SUR17B meter wave air warning radar Naval radars Military radars of the People's Republic of China